以下程序中使用了transform对象的哪个成员变量: void Update() { float tiltAroundZ = Input.GetAxis("Horizontal") * tiltAngle; float tiltAroundX = Input.GetAxis("Vertical") * tiltAngle; Quaternion target = Quaternion.Euler(tiltAroundX, 0, tiltAroundZ); transform.rotation = Quaternion.Slerp(transform.rotation, target, Time.deltaTime * smooth); } A. rotation B. tiltAngle C. target D. deltaTime